anyone can call relayTx and tx.origin is how to obtain who called relayTx.  only if the caller of relayTx is the owner of the exchange contract, allow ether to be claimed more than once
anyone can call relayTx and tx.origin is how to obtain who called relayTx.  only if the caller of relayTx is the owner of the exchange contract, allow ether to be claimed more than once

vaporry/btcrelay,ethereum/btcrelay,ethers/btcrelay,ethereum/btcrelay